Prueba así
Código HTML:
<object id="intro" classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=6,0,29,0" height="400" width="500">
<param name="movie" value="entrada.swf" />
<param name="quality" value="high" />
<embed name="intro" src="images/entrada.swf" quality="high" pluginspage="http://www.macromedia.com/go/getflashplayer" type="application/x-shockwave-flash" height="400" width="500" />
</object>